Time and Day: 0700
Thursday
The Snapshot: It’s
snowing with 2” of new – yeah. Drying today and tomorrow with a snow, rain, snow event for the weekend.
The Science: Cool westerly
flow aloft and the forming of a weak Puget Sound Convergence zone has provided
some snow this morning. Hopefully, another inch or two will fall before
it tapers off in a few hours. Snow will
taper off due to a high pressure ridge moving in; we may even get a peek at the sun, which will be nice after the
last 3 days of grayness.
The next weather
event to turn our attention to arrives tomorrow. A strong low-pressure
cell tracking up the coast with an embedded triple frontal system will bring the
next round of snow/rain/snow to Stevens Pass.
Models have it
playing out like this: Lights snow
begins late tomorrow afternoon with freezing levels around 4000’, freezing levels rise to +-6500’ overnight
with rain, a cold front moves through Saturday
morning shifting the rain back to snow.
Snow is expected Saturday afternoon and evening with 4-6” possible.
The Long Range: High pressure builds over the PNW on Sunday for
a well deserved dry and sunny batch of weather.
Another warm and wet system arrives on Tuesday, just in time for the
first day of spring. March 21st
= spring equinox.
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24hr Precipitation
ending at 4am:
Today 24hr water = .25
snow = 2-4
Tomorrow’s 24hr water
= .5 -.75 snow = 2-4
Trend and Timing:
Snow ends this morning
with mostly dry conditions prevailing through noon tomorrow.
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24hr temperature ending at 4 am:
Low: 26 High:
32
Freezing level: +-4000’
Trend and Timing:
Daytime warming with some sun breaks will push surface
temperatures up today. Cooling
tonight with rising freezing levels tomorrow night.
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24hr Winds (mph) ending at 4 am:
Base: 5-10 W
Ridge Top: 5-15 W
Trend and Timing:
The gusty westerly
wind blowing this morning will diminish in a few hours. East flow is expected to develop tomorrow.
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jM
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